Sarah Pierce, University of Washington (IMAGE) University of Washington Caption This is Sarah Pierce, the lead author of an Oct. 31, 2011, PNAS study on the genetics of pentosuria. Credit University of Washington Usage Restrictions For use by news media only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.